<template>
  <div class="login-container">
    <div class="title-container">
      <img src="http://destiny001.gitee.io/admin-dist/img/logo.b5a855ee.png" alt="">
    </div>
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">

      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="Username"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="Password"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
        </span>
      </el-form-item>

      <el-button class="btn" :loading="loading" type="primary" @click.native.prevent="handleLogin">登录</el-button>
      <el-button class="btn btn-gray" :loading="loading" type="primary" @click.native.prevent="reset">重置</el-button>

    </el-form>
  </div>
</template>

<script>
export default {
  name: 'Login',
  data() {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { pattern: /^[a-z]\w{4,19}$/, message: '必须以字母开头，长度在 4 到 20 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ]
      },
      loading: false,
      passwordType: 'password',
      redirect: undefined
    }
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect
      },
      immediate: true
    }
  },
  methods: {
    showPwd() {
      if (this.passwordType === 'password') {
        this.passwordType = ''
      } else {
        this.passwordType = 'password'
      }
      this.$nextTick(() => {
        this.$refs.password.focus()
      })
    },
    // 登录按钮
    handleLogin() {
      this.$refs.loginForm.validate(async(flag) => {
        // console.log(flag)
        if (!flag) return
        this.loading = true
        try {
          await this.$store.dispatch('user/login', this.loginForm)
          this.$router.push('/')
          this.$message({
            showClose: true,
            message: '登录成功',
            type: 'success'
          })
        } finally {
          this.loading = false
        }
      })
    },
    // 重置按钮
    reset() {
      this.loginForm.username = 'admin'
      this.loginForm.password = '123456'
    }
  }
}
</script>

<style lang="scss">
/* 修复input 背景不协调 和光标变色 */
/* Detail see https://github.com/PanJiaChen/vue-element-admin/pull/927 */

$bg:#2B4B6B;
$light_gray:#fff;
$cursor: #fff;

@supports (-webkit-mask: none) and (not (cater-color: $cursor)) {
  .login-container .el-input input {
    color: $cursor;
  }
}

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;

    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      caret-color: $cursor;

      &:-webkit-autofill {
        box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: $cursor !important;
      }
    }
  }

  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style lang="scss" scoped>
$bg:#2B4B6B;
$dark_gray:#889aa4;
$light_gray:#eee;

.el-form-item__content {
  background-color: #fff!important;
}

.title-container {
    position: absolute;
    top: 24%;
    left: 44%;
    background-color: #fff;
    width: 152px;
    height: 152px;
    padding: 10px;
    border-radius: 50%;
    border: 1px solid #eee;
    box-shadow: 0 0 10px #ddd;
    z-index: 999;

    img {
      width: 100%;
      height: 100%;
    }
  }

.login-container {
  position: relative;
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 520px;
    max-width: 100%;
    padding: 130px 30px 20px;
    margin: 0 auto;
    overflow: hidden;
    background-color: #fff;
    border-radius: 5px;
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }

  .btn {
    position: relative;
    left: 314px;
    border: 0;
  }

  .btn-gray {
    background-color: #909399;
  }
}
</style>
